Adjusting The Pump Stall Threshold - Honeywell MiniRAE 3000+ User Manual

Adjusting the pump stall threshold

If the gas inlet is blocked but the pump does not shut down, or the pump shuts down too easily
with a slight blockage, the pump stall threshold value may be set too high or too low. Use the
following steps to adjust the pump stall threshold:
Pump High
1. In Diagnostic Mode, press the [MODE] key repeatedly until "Pump High" is displayed. The
display shows the maximum, minimum, and stall values for the pump at its high speed.
Write down the "Max" reading.
2. Block the gas inlet and watch the pump current reading (labeled "I") increase. Write down
its blocked reading.
Note: If the pump current reading does not increase significantly (less than 10 counts),
then there may be a leak in the gas inlet or the pump is weak or defective.
3. Add the two readings you wrote down. This is the average of the maximum block count and
the maximum idle count. Divide that number by 2. Use the [Y/+] or [N/ ] key to increase or
decrease the stall value to equal that number.
4. Press the [MODE] key to exit this display.
Note: the instrument will automatically save the last stall value.
Pump Low
1. In Diagnostic Mode, press the [MODE] key until "Pump Low" is displayed. The display
shows the maximum, minimum, and stall values for the pump at its low speed. Write down
the "Max" reading.
2. Block the gas inlet and watch the pump current reading (labeled "I") increase. Write down
its blocked reading.
Note: If the pump current reading does not increase significantly (less than 10 counts),
then there may be a leak in the gas inlet or the pump is weak or defective.
3. Add the two readings you wrote down. This is the average of the maximum block count and
the maximum idle count. Divide that number by 2. Use the [Y/+] or [N/ ] key to increase or
decrease the stall value to equal that number.
4. Press the [MODE] key to exit this display.
Handheld PID Monitors 99 User Manual